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R, L M|LLSL 2`Sheets--SheetL Improvement in Coffee-Roasters. 10.115,2248. Pat f m 231' l ene ay ,871.

uaaonnaa zsh tsh 12. R. L. MILLS. ses ee YImprovement in Coffee-Roasters.

Patented May 23,1871.

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RIGHAl-RD'L. M'ILL'S, or SPRINGFIELD, Quid lLettersPatent No.' 115,228, dated may 23, 1871.

" "iMPRoi/EMNTIN COFFEE-MASTERS. f

i .The Schedule `referred to inthese Letters Patent -andvmaking part of the same.

lticrmnn ofthe' city of Springheld, in

f `theconnt'y of ClarklandlState of "Ol1io, have invented certain Improvements in Coffee and Nut-Roasters,

My invention relates tortliat class vof coffee and nutj'roasters in which the `nuts or coffee are :placed in a cylinder'hungfupon aishafto'r `journalsand turned by hand or other p owerlto, bring all -parts of its sides in contact with; the heat` applied tothe same, the rotation keeping the nuts orcoiiec so stirred 4as to prevent i burning. l r l l The iirstpartof my invention .consists in the con-` struction of a-cylinder of `sheet metal, having aninner l `cylinder orlining of a corrugated forum The inner cylinder may beimadel of` perfbrated'sheet metal or of wire-gauze, thercorrugations 'running lengthwise of the same, their `object-leingltofacilitate the process of roastingpthe coffee` `or nuts `by more thoroughly stirring and'constantlychanging the position of the contents of Y the cylinder, so fthatithe Whole shall be uniformly and evenly done.` 'I he second part of my `invention consists in a peculiar constructiou'and arrangement ofthe heatingfurnace and parts. attached thereto, so as to adapt it to the use of` gas, coke, orcharcoal, with adjustable parts to facilitate the tremoval of ashes or fire there-4 from, to .regulate the draught, `and to cool it olf.

y Thethird part of my `invention consists in a novel` arrangement `ofthe -framework of 'the machine, theV mnn'erof attachingtheroasting-cylinder to the same, i of supporting it when being filled and when discharg- J `Figure 1 `is an elevation of my nut andcoee-x, toaster, theroasting-cylinder bein g inclosed, the 'Whole resting in arnetalriaine. yIt also showsthe postD, i "which is `nsedas'a support for the cylinder when disk cliarging `its contents.` Bothere mounted on plat- M `formH. y 1

Figure 2 is aplan viewof the machine open, the

cover A being thrownback'and the roasting-cylinder laidover with"V the` crank end of Vits s haft resting'in thefork of` postD. i l

Figureis a view of the end on the left in g..2,

l showing a section oi coverA as attached. j; Figure4- `is a viewof one of the outer .furnaceplates.

Figure isa section of theend ofthe frame on the A is the top cover, lof sheet metal`, sen1icylindrical inshape, and is hinged by, short bars pivotedto the i 'l rear o f the endplates A'` of the furnace, as seen in fig. 3a

t a is the chimney fortheescape of smoke, steam, and gas.j U 1 a! is a knob or handle to raise thefcover A.

. B, aiig. 2, is the roasting-cylinder, which is made double.

The outer part f is of sheet metal, and it and the heads, as seen atb", iig. 2, are pierced with minuteA holes for the escape ofl steam.l

The inner cylinder is made of perforated sheet metal, (or may be of wire-ganze;) of corrugated form,

(see f, hg. 2, where 'a section of j" is cutout,) and-is supported by projections or flanges on ,the heads b" and b", so as to leave a' space for heated air between it and outer case f.

The coffee or nuts are putin `and emptied out through the-opening g'.

The doo'rg shuts this opening, and is fastened by a slide-bolt;

Ill-fig. Zthe cylinderis ,shown in aninclined position, the shaft p on theright lresting in the fork of post D, which is lower than the other end ofthe 4shaft attached to the upright b' by the collar n, through which it passes and is secured by a pin.

This collar rests on journals and forms a swivel or cross-joint, and allows the cylinder B to be partially rotated on it (as a center) endwise in turning it out from the furnace over on the post D, (the crank end 4o f the cylinder 4describing a curvilinear `n1ovement equal to rather more than half a circle.) This operation is fordscha'rging the oiee or nuts When -they are sufficiently roasted to take out. `The hole g is turned under for that purpose, the nuts or coffee running down to that end.

In filling the cylinder the crank end on the left, hg. 1,is simply raised up out ofthe furnace, after the cover A is thrown back, to the top of the forked upright b, its shaft resting on the pin c, (which is pulled 'out and slippedunderit) the door of the cylinder, g,

turned up and opened, and the nuts or coffee poured 'The inclination of the cylinder allows the `contents v to run toward the lower end, a slight shake aiding to settleA them down. When filled it is lowered into place,

the cover A closed, and itis ready for operation.

When coal or coke is-us'ecl it is put in between the outer furnace-plates E 4and the grate C.

Plates E slide down in grooves'or between flanges onthe inner part of the end plates A' until their bottom edges reach the lower part ofgrate-pieces O, which l extend downward perpendicularly.A l The pivoted bar-hingesz" allow the Vcover A to be thrown backfar enough tn withdraw the outer furnace-plate E on the back side, same as the front one. Holes e e in this plate (iig. 4) admit air and aid the draught.

The .construction of the furnace in a semiciroular form, as shown, brings the heat in contact with nearly.

' one-half the cylinder at a time. f

'lhere is suriicicnt space between the perpendicular portions of the grate-pieces O to allow the dust and ashes to sift through.

When necessary to -discharge ashes coal, or coke from the furnace, or withdraw the fire for the purpose of cooling` oli' the machine, thefurnace-plates E, front and rear, are' drawn out by thehandles h.

The hooks or lugs ton their-upper corners aid in keeping them in place when shoved down, as they hook over the top of the Hangs on the end plates A'.

To facilitatethe process of cooling off the machine and discharging the contents ofthe furnace the lower p'arts'of the end plates A' are hinged by bolts cf to the frame Gso that they can be opened-apartes,

shown in iig. 3.

The braces t, which are seen in same figure, hold them together when closed.

These are pivoted at their upper ends to A', their lower ends, which are notched, resting"6n the lower front and rear bars of the frame. They are connected by rods, fi, running lengthwise, and when thrown out over the frame-bar, as seen on the right in g. 3, allow A A to fall apart. By taking hold ofthe rod fi" and shaking the gratos all thedust and ashes are easily sii'ted out.

The frame G is made of metal, and its novel feat ures consist ol' its nprghts b and b and their attachf ments, as seen in figs. 3 and 5, b being forked and of a slightly-curved shape, and rising nearly to the height` of the cover A, and having the pin C at the top for restiugthe cylinder upon, as before described. b' is shorter, being only suciently high for the horizontal bearing ofthe shaft p, the end of which, projecting from the cylinder, rests in the collar n in the fork ofb. This collar n works on journals at right angles with the cylinder'shai't, (see iig. 5.) The construction of these parts is essential to the curvilinear movements by which the cylinder is placed on the post D, iig.2.

I do not claim the use of acylinder made double for roasting .coliee and nuts, as the same has been used before; nor do I claimcorrugating sheet metal to form a cylinder, Aas the same has been used for water-couductors; but

What I claim as newA is 1. The corrugated lining or inner cyliuderf, in combination with the oute'r casing f in cylinder B, substantially as and for the purpose hereinbefore set forth.

2. The three bearing points for the cylinder, consisting of upright b, collar n, and post l), substantially as described, for the purpose set fbi-th.

3. Bearing-pin c, upright b, collar n, upright b', and cylinder B, in combination, substantially as and for the purpose hereiubefore set forth.

4.The adjustable furnace mechanism, consisting of the hinged endvpiates A', outer furnace-plates E, grates O, y,lockingdraces fi, and rods if', substantially as shown' and described, for vthe purpose set forth.

. `5 Frame G, in combination with the adjustable furnace mechanism and roasting-cylinder described, substantially as and for the purpose hereinbeore set forth.

6. Gasfpipe fm, in combination with cylinder B, cover A, end plates A', outer furnace-plates E, and frame G, substantially as described, for the purpose hereinbefore set forth,

Witnesses:

B. C. CONVERSE, GEO. C. RAWLINs.

aIoHD. L. MILLS. 

